FZPN03 KNHC 240420
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC MON AUG 24 2026

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

SECURITE

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 0000 UTC MON AUG 24.
24 HOUR FORECAST VALID 0000 UTC TUE AUG 25.
48 HOUR FORECAST VALID 0000 UTC WED AUG 26.

.WARNINGS.

...HURRICANE WARNING...
.TROPICAL STORM ISELLE NEAR 17.1N 115.3W 999 MB AT 0300 UTC AUG
24 MOVING NW OR 310 DEG AT 10 KT. MAXIMUM SUSTAINED WINDS 45 KT
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 100 NM E
SEMICIRCLE...110 NM SW QUADRANT AND 0 NM NW QUADRANT. SEAS 4 M 
OR GREATER WITHIN 210 NM NE QUADRANT...150 NM SE QUADRANT...75 NM
SW QUADRANT...AND 90 NM NW QUADRANT WITH SEAS TO 5.5 M. WITHIN 
21N111W TO 22N114W TO 18N119W TO 13N118W TO 13N114W TO 17N110W TO
21N111W WINDS 20 TO 33 KT. SEAS 2.5 TO 4.5 M.
.24 HOUR FORECAST TROPICAL STORM ISELLE NEAR 19.4N 117.8W. 
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE 
WINDS WITHIN 110 NM NE QUADRANT...130 NM SE QUADRANT...90 NM SW 
QUADRANT...AND 60 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 180 NM 
E SEMICIRCLE...120 NM SW QUADRANT AND 90 NM NW QUADRANT WITH SEAS TO 
6.0 M. WITHIN 21N112W TO 25N114W TO 24N118W TO 21N122W TO 
18N123W TO 15N115W TO 21N112W SE WINDS 20 TO 33 KT. SEAS 2.5 TO 
4.5 M. WITHIN 14N116W TO 16N116W TO 15N120W TO 14N121W TO 11N120W
TO 11N117W TO 14N116W S TO SW WINDS 20 TO 30 KT. SEAS 2.5 TO 3.0
M.
.36 HOUR FORECAST HURRICANE ISELLE NEAR 20.4N 119.6W. MAXIMUM
SUSTAINED WINDS 65 KT GUSTS 80 KT. 
.48 HOUR FORECAST TROPICAL STORM ISELLE NEAR 21.0N 121.4W. 
MAXIMUM SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE 
WINDS WITHIN 120 NM NE QUADRANT...100 NM SE QUADRANT...60 NM SW 
QUADRANT...AND 70 NM NW QUADRANT. SEAS 4 M OR GREATER WITHIN 210
NM E SEMICIRCLE...AND 120 NM W SEMICIRCLE OF CENTER WITH SEAS TO
7.0 M. WITHIN 23N115W TO 26N117W TO 26N124W TO 21N126W TO 
16N120W TO 17N116W TO 23N115W E TO SE WINDS 20 TO 33 KT. SEAS 
2.5 TO 4.5 M. WITHIN 12N123W TO 11N125W TO 10N124W TO 10N123W TO 
11N122W TO 12N123W SW WINDS 20 TO 25 KT. SEAS 2.5 TO 3.0 M.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE
AND INTENSITY.

.SYNOPSIS AND FORECAST.

.WITHIN 12N87W TO 11N89W TO 10N89W TO 10N88W TO 11N86W TO
12N87W...INCLUDING THE GULF OF PAPAGAYO... E WINDS 20 TO 30 KT.
SEAS TO 2.5 M. 
.24 HOUR FORECAST WITHIN 12N86W TO 11N88W TO 10N88W TO 10N87W TO
10N86W TO 11N86W TO 12N86W...INCLUDING THE GULF OF PAPAGAYO... 
NE TO E WINDS 20 TO 30 KT. SEAS TO 2.5 M. 
.48 HOUR FORECAST WITHIN 12N86W TO 11N88W TO 10N88W TO 10N87W 
TO 10N86W TO 11N86W TO 12N86W...INCLUDING THE GULF OF PAPAGAYO...
NE TO E WINDS 20 TO 30 KT. SEAS TO 2.5 M.

.WITHIN 16N94W TO 16N95W TO 15N95W TO 16N94W...INCLUDING THE
GULF OF TEHUANTEPEC... N WINDS 20 TO 30 KT. SEAS TO 2.5 M. 
.24 HOUR FORECAST LITTLE CHANGE. 
.48 HOUR FORECAST LITTLE CHANGE.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 2.5 M.

CONVECTION VALID AT 0350 UTC MON AUG 24...

.TROPICAL STORM ISELLE...NUMEROUS MODERATE TO STRONG FROM 11N TO
20N BETWEEN 112W AND 120W.

.TROPICAL WAVE NEAR 89W...SCATTERED MODERATE TO ISOLATED STRONG 
FROM 03N TO 16N E OF 98W.

.TROPICAL WAVE NEAR 102W...SCATTERED MODERATE TO ISOLATED STRONG 
FROM 08N TO 19N BETWEEN 93W AND 107W.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM 08N84W TO 12N110W THEN CONTINUES
SW OF ISELLE FROM 12N120W TO 08N130W TO BEYOND 07N140W. SCATTERED
MODERATE TO ISOLATED STRONG FROM 01N TO 12N W OF 125W. 

$$
.FORECASTER RAMOS. NATIONAL HURRICANE CENTER.